Title

Linear and two-photon photophysical properties of a series of symmetrical diphenylaminofluorenes

Authors

Authors

K. D. Belfield; A. R. Morales; J. M. Hales; D. J. Hagan; E. W. Van Stryland; V. M. Chapela;J. Percino

Comments

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Abbreviated Journal Title

Chem. Mat.

Keywords

ABSORBING FLUORENE DERIVATIVES; BACKWARD-STIMULATED EMISSION; PHASE-CONJUGATION PROPERTIES; ABSORPTION CROSS-SECTIONS; MULTIBRANCHED; STRUCTURES; ONE-PHOTON; CHROMOPHORES; EXCITATION; MICROFABRICATION; PHOTOSTABILITY; Chemistry, Physical; Materials Science, Multidisciplinary

Abstract

A series of linear, symmetrical, diphenylaminofluorene-based materials are reported. The series investigated was model 9,9-didecyl-2,7-bis(N,N-diphenylamino)fluorene (1), oligomer 9,9-didecyl-N,N-bis(9,9-didecyl-7-N,N-diphenylaminofluoren-2-yl)-N,N-diphenyl-fluorene-2,7-diamine (2), and poly(9,9-didecyl-2,7-diphenylaminofluorene) (3). Structural characterization and photophysical properties, including linear absorption, quantum yields, single photon fluorescence, and two-photon absorption (2PA) spectra, were studied in polar and nonpolar solvents. 2PA spectra were determined by two independent methods: a nonlinear transmission method employing a femtosecond white-light continuum (WLC) and a two-photon fluorescence (2PF) method. Polymer 3, a low-molecular-weight polymer with fourteen fluorene units, exhibited a very large two-photon absorption cross-section of 17 200 and 6800 x 10(-50) cm(4) s photon(-1) molecule(-1) as estimated from the WLC and 2PF methods, respectively.

Journal Title

Chemistry of Materials

Volume

16

Issue/Number

11

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

2267

Last Page

2273

WOS Identifier

WOS:000221683300031

ISSN

0897-4756

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